package cn.tedu.order.service;

import cn.tedu.order.entity.Order;
import cn.tedu.order.feign.AccountClient;
import cn.tedu.order.feign.EasyIdClient;
import cn.tedu.order.feign.StorageClient;
import cn.tedu.order.mapper.OrderMapper;
import cn.tedu.order.tcc.OrderTCCAction;
import io.seata.spring.annotation.GlobalTransactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;


@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private AccountClient accountClient;
    @Autowired
    private StorageClient storageClient;
    @Autowired
    private EasyIdClient easyIdClient;
    @Autowired
    private OrderTCCAction orderTCCAction;

    @GlobalTransactional
    @Override
    public void create(Order order) {
        // 调用全局唯一id发号器，获取一个唯一不重复的id
        String s = easyIdClient.nextId("order_business");
        Long orderId = Long.valueOf(s);

        // // 临时随机产生一个id，完成发号器后，这里的代码要删除
        // Long orderId = Math.abs(new Random().nextLong());

        order.setId(orderId);

        //orderMapper.create(order);

        /*
        orderTCCAction 是一个动态代理对象，
        其中用AOP添加了拦截器，会拦截调用，在拦截器中创建上下文对象
         */
        orderTCCAction.prepare(
                null,
                order.getId(),
                order.getUserId(),
                order.getProductId(),
                order.getCount(),
                order.getMoney());

        // 远程调用库存，减少商品库存
        storageClient.decrease(order.getProductId(),order.getCount());
        // 远程调用账户，扣减账户金额
        accountClient.decrease(order.getUserId(),order.getMoney());
    }
}